user.rb

class User
  attr_reader :email
  # attr_writer :name
  attr_accessor :name

  def initialize(name, email)
    @name = name
    @email = email
  end

  # def name
  #   return @name
  # end

  # def name=(new_name)
  #   @name = new_name
  # end

  def email=(new_email)
    @email = new_email
  end

  def puts_self
    puts self
  end

  # def email
  #   return @email
  # end

  def summary(name)
    self.name
    return "#{self.name}: #{self.email}"
  end
end

neo = User.new("Mr. Anderson", "[email protected]")
puts neo
neo.puts_self
hermine = User.new("Hermine Granger",
                   "[email protected]")
puts hermine
hermine.puts_self

# puts "Hello #{neo.name}"
# neo.name = "My name is NEO!"
# puts neo.summary

puts hermine.summary
# puts hermine.name


# Product Example



class Product
  attr_accessor :name, :quantity_in_stock
  attr_reader :quantity_sold

  def initialize(name, quantity_in_stock)
    @name = name
    @quantity_in_stock = quantity_in_stock
    @quantity_sold = 0
  end

  def summary
    return "#{@name} with: #{@quantity_in_stock} in stock and #{@quantity_sold}"
  end

  def available?
    return quantity_in_stock > 0
  end

  def sell(amount)
    @quantity_in_stock -= amount
    @quantity_sold += amount
  end
end


# Constants, Classes and local variables.

# # Constant
# TIP_AMOUNT = 0.15
# ...

# TIP_AMOUNT = 0.20

# # Class definition
# class Time

# # regular variable
# total_bill = 37.65